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The steps and methods of the inverter

View times:3067  Author:admin  Published time:2016-8-19


The inverter is also called the power regulator, which can be divided into two types according to the application of the inverter in the photovoltaic power generation system. According to waveform modulation, square wave inverter, step wave inverter, sine wave inverter and combined three-phase inverter can be divided into three phases. For the inverter used in grid connected system, according to whether there is no transformer can be divided into transformer type inverter and transformer type inverter.
Energy saving and environmental protection is the focus of common concern, the photovoltaic industry from Europe, Australia, to now, China has become a hot industry, within a few short years China PV inverter manufacturer such as Chunsun like birth, but how to choose solar inverter the still have a certain standard.
Inverter is a key component of solar photovoltaic power generation system, so the inverter has higher requirements, in the selection of inverter should pay attention to its technical specifications meet the requirements of the system design. General focus on the following several technical indicators.
Purchase procedures and methods
1, power
General according to the system configuration and the corresponding power inverter, power inverter selection should and solar array maximum power matching, generally select similar photovoltaic inverter rated output power and the total input power around, so you can save costs.
2, key technical indicators
1), select the appropriate input and output voltage range, to ensure the best combination of products.
2), the European efficiency of the inverter: its level will directly affect the design cost and power generation efficiency of photovoltaic power generation system.
(3) the maximum power tracking function (MPPT) of the solar cell array and its efficiency.
4), should pay attention to the selection of the inverter should have basic protection functions, such as over current / short circuit protection, over power protection, over temperature protection, lightning protection, island protection and other functions.
5, inverter output current waveform distortion rate (THD%) to be less than 4%.
3, certification standards
As the core equipment of photovoltaic power station, the grid connected inverter must have high reliability in order to ensure the stable, reliable and continuous operation of the power station. It should have a sales destination safety certification, electromagnetic compatibility certification, and national grid certification: (in Europe as an example)
Safety rules: EN62109-1, EN62109-2
Electromagnetic compatibility: EN61000-6-1, EN61000-6-2, EN61000-6-3, EN61000-6-4
Grid connected authentication: VDE0126-1-1 (Germany)
4, brand and service
Recommended to buy a good reputation in the current market brand, because the general brand image of a good company, usually in the technology, as well as the maintenance of services have a greater investment, to meet the customer's commitment.

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